umount

Purpose

Dismounts an Oracle ACFS file system.

Syntax and Description

umount -h
umount [-v] -l -n volume_device |mount_point
umount -a -l -n [-t acfs]

umount -h displays usage text and exits.

Table 16-5 contains the options available with the umount command.

Table 16-5 Options for the Linux umount command

Option	Description
`-h`	Displays the usage help text and exits.
`-t` `acfs`	Specifies the type of file system on Linux. `acfs` designates the Oracle ACFS type.
`-v`	Specifies verbose mode. The progress is displayed as the operation occurs.
`-a`	Specifies to dismount all Oracle ACFS file systems on this node.
`-l`	Specifies a lazy unmount. The Oracle ACFS file system is dismounted, but the cleanup of all references to the file system occurs when the system is no longer busy.
`-n`	Specifies not to update the `/etc/mtab` file.
`volume_device`	Specifies an Oracle ADVM volume device file that has been formatted by `mkfs`.
`mount_point`	Specifies the directory where the file system is mounted. This directory must exist before you run the `mount` command.

umount detaches an Oracle ACFS from the file system hierarchy on the current node. If the file system is busy, umount fails.

root privileges are required to run the umount command.

Examples

The following examples show how to dismount an Oracle ACFS file system. The first example uses the volume device file and the second example uses the file system.

Example 16-4 Using the umount command

# /bin/umount /dev/asm/volume1-123

# /bin/umount /acfsmounts/acfs1